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Title:
BEARING MEMBER AND ITS MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2008175386
Kind Code:
A
Abstract:

To provide a bearing member wherein a grooved part for generation of a dynamic pressure is formed while the bearing surface provided on the inside of an electrocast portion is retained in high precision, and its manufacturing method.

In the separating process of the electrocast portion 4 from a master 10, the master 10 is drawn off in such a direction that the shaping part 12 passes the separation surface 15 of the portion 4 from the master 10, whereby a projection 12a on the shaping part 12 deforms part of the separation surface 15 of the electrocast portion 4 plastically. Thereby a plurality of axially directed grooves 8a are formed at the inside of the electrocast portion 4 by plastic deformation generated by the projection 12a, and the part of the separation surface 15 not subjected to plastic deformation due to the projection part 12a remains as the bearing surface 7.


Inventors:
YAMAMOTO TETSUYA
KOMORI ISAO
Application Number:
JP2007260123A
Publication Date:
July 31, 2008
Filing Date:
October 03, 2007
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD
International Classes:
F16C33/14; F16C17/02
Domestic Patent References:
JP2007071375A2007-03-22
JP2003056552A2003-02-26
JPH10137886A1998-05-26
JPH08243673A1996-09-24
JP2007071375A2007-03-22
Attorney, Agent or Firm:
Hideka Tanaka
Yoshiyuki Shiraishi
Kunihiko Shiromura
Tsuyoshi Kumano